All the white blocker squares are Jelly pieces plust all the spinners in the middle 3 columns, so the more you can clean up in terms of the spinner pieces, the more you have to work with candy wise. Try to get a horizontal striped candy down to the bottom to clear out the Jelly.
Here is a walkhtrough video for Candy Crush Level 91! Watch it and complete the level in a few tries
Thanks to Matthew Dean
Patricia Frederick’s Tips For Candy Crush Level 91
The worst part of this level is the licorice whirls. Since it’s a jelly level, striped/wrapped combos are great here. A color bomb/striped candy combo is also very effective. The hardest jellies are the bottom row, so try for a horizontally striped candy there.